$small-bp: 640px;
$large-bp: 840px;
$ui-opacity: 0.5;
$ui-color: rgba(#fff, $ui-opacity);
$font: 'Russo One',
    arial,
    sans-serif;
$letter-spacing: 0.06em;

* {
    position: relative;
    box-sizing: border-box;
}

html,
body {
    height: 100%;
}

html {
    background-color: #000;
}

body {
    overflow: hidden;
    color: $ui-color;
    font-family: $font;
    line-height: 1.25;
    letter-spacing: $letter-spacing;
}

// Utils
// -------
.hide {
    opacity: 0;
    visibility: hidden;
}

.remove {
    display: none !important;
}

.blur {
    filter: blur(12px);
}

.container {
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
}

.loading-init {
    width: 100%;
    align-self: center;
    text-align: center;
    text-transform: uppercase;

    &__header {
        font-size: 2.2em;
    }

    &__status {
        margin-top: 1em;
        font-size: 0.8em;
        opacity: 0.75;
    }
}

.stage-container {
    // Keep menu blur contained
    overflow: hidden;
    // Let border width add to size
    box-sizing: initial;
    border: 1px solid #222;
    // Allow border to be hidden when fullscreen
    margin: -1px;

    // no need for border on small screens, especially since it causes horizontal scrolling on iOS.
    @media (max-width: $large-bp) {
        border: none;
        margin: 0;
    }
}

.canvas-container {
    width: 100%;
    height: 100%;
    transition: filter 0.3s;

    canvas {
        position: absolute;
        // Use lighten blend mode so the sky can be shown lighting up behind the canvases.
        mix-blend-mode: lighten;
        // Chrome mobile always places <canvas> elements on their own composite layer, but Chrome
        // on desktop doesn't, so we'll force it. Compositing makes sense since the canvas elements,
        // but not all UI, redraws each frame.
        transform: translateZ(0);
    }
}

.controls {
    position: absolute;
    top: 0;
    width: 100%;
    padding-bottom: 50px;
    display: flex;
    justify-content: space-between;
    transition: opacity 0.3s, visibility 0.3s;

    @media (min-width: $large-bp) {
        visibility: visible;

        &.hide:hover {
            opacity: 1;
        }
    }
}

.menu {
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    background-color: rgba(0, 0, 0, 0.42);
    transition: opacity 0.3s, visibility 0.3s;

    &__inner-wrap {
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        position: absolute;
        top: 0;
        bottom: 0;
        left: 0;
        right: 0;
        transition: opacity 0.3s;
    }

    &__header {
        margin-top: auto;
        margin-bottom: 8px;
        padding-top: 16px;
        font-size: 2em;
        text-transform: uppercase;
    }

    &__subheader {
        margin-bottom: auto;
        padding-bottom: 12px;
        font-size: 0.86em;
        opacity: 0.8;
    }

    form {
        width: 100%;
        max-width: 400px;
        padding: 0 10px;
        overflow: auto;
        -webkit-overflow-scrolling: touch;
    }

    .form-option {
        display: flex;
        align-items: center;
        margin: 16px 0;
        transition: opacity 0.3s;

        label {
            display: block;
            width: 50%;
            padding-right: 12px;
            text-align: right;
            text-transform: uppercase;
            user-select: none;
        }

        &--select {
            select {
                display: block;
                width: 50%;
                height: 30px;
                font-size: 1rem;
                font-family: $font;
                color: $ui-color;
                letter-spacing: $letter-spacing;
                background-color: transparent;
                border: 1px solid $ui-color;

                option {
                    background-color: black;
                }
            }
        }

        &--checkbox {
            input {
                display: block;
                width: 26px;
                height: 26px;
                margin: 0;
                opacity: $ui-opacity;
            }
        }

        @media (max-width: $large-bp) {

            select,
            input {
                outline: none;
            }
        }
    }
}

.close-menu-btn {
    position: absolute;
    top: 0;
    right: 0;
}

.btn {
    $size: 50px;
    opacity: 0.6;
    width: $size;
    height: $size;
    display: flex;
    user-select: none;
    cursor: default;
    transition: opacity 0.3s;

    &--bright {
        opacity: 0.5;
    }

    @media (min-width: $large-bp) {
        &:hover {
            opacity: 0.32;
        }

        &--bright:hover {
            opacity: 0.75;
        }
    }

    svg {
        display: block;
        margin: auto;
    }
}

.credits {
    margin-top: auto;
    margin-bottom: 10px;
    padding-top: 6px;
    font-size: 0.8em;
    opacity: 0.75;

    a {
        color: $ui-color;
        text-decoration: none;

        &:hover,
        &:active {
            color: rgba(white, 0.75);
            text-decoration: underline;
        }
    }
}

.help-modal {
    $self: &;
    $duration-in: 0.4s;
    $duration-out: 0.25s;
    $curve-in: ease-out;
    $curve-out: ease-in;
    display: flex;
    justify-content: center;
    align-items: center;
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    visibility: hidden;
    transition-property: visibility;
    transition-duration: $duration-out;

    &__overlay {
        position: absolute;
        top: 0;
        bottom: 0;
        left: 0;
        right: 0;
        opacity: 0;
        transition-property: opacity;
        transition-timing-function: $curve-out;
        transition-duration: $duration-out;
    }

    &__dialog {
        display: flex;
        flex-direction: column;
        align-items: center;
        max-width: 400px;
        max-height: calc(100vh - 100px);
        margin: 10px;
        padding: 20px;
        border-radius: 0.3em;
        background-color: rgba(#000, 0.4);
        opacity: 0;
        transform: scale(0.9, 0.9);
        transition-property: opacity, transform;
        transition-timing-function: $curve-out;
        transition-duration: $duration-out;

        @media (min-width: $large-bp) {
            font-size: 1.25rem;
            max-width: 500px;
        }
    }

    &__header {
        font-size: 1.75em;
        text-transform: uppercase;
        text-align: center;
    }

    &__body {
        $separator-color: rgba(#FFF, 0.25);
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
        margin: 1em 0;
        padding: 1em 0;
        border-top: 1px solid $separator-color;
        border-bottom: 1px solid $separator-color;
        line-height: 1.5;
        color: rgba(#FFF, 0.75);
    }

    // These styles can be adopted as a standard button style if needed.
    &__close-btn {
        flex-shrink: 0;
        outline: none;
        border: none;
        border-radius: 2px;
        padding: 0.25em 0.75em;
        margin-top: 0.36em;
        font-family: $font;
        font-size: 1em;
        color: $ui-color;
        text-transform: uppercase;
        letter-spacing: $letter-spacing;
        background-color: rgba(#FFF, 0.25);
        transition: color 0.3s, background-color 0.3s;

        &:hover,
        &:active,
        &:focus {
            color: #FFF;
            background-color: #09F;
        }
    }

    &.active {
        visibility: visible;
        transition-duration: $duration-in;

        #{$self}__overlay {
            opacity: 1;
            transition-timing-function: $curve-in;
            transition-duration: $duration-in;
        }

        #{$self}__dialog {
            opacity: 1;
            transform: scale(1, 1);
            transition-timing-function: $curve-in;
            transition-duration: $duration-in;
        }
    }
}